Specifications
Table Of Contents
- Important Safety Instructions
- 1.0 Introduction
- Table 1 Model Numbers and Ratings
- 1.1 Definitions
- Uninterruptible Power System (UPS)
- UPS Module
- UPS Module Cabinet
- Battery Cabinet
- Input Power
- Input Filter
- Input Isolation Transformer
- Input Auto Transformer
- Rectifier/Charger
- Inverter
- Internal Control System
- Operator Controls and Display
- Static Bypass Line
- Static Transfer Switch
- Transfer
- Retransfer
- Maintenance Bypass Line
- External Maintenance Bypass Cabinet
- Slim-Line Distribution Cabinet
- 1.2 Modes of Operation
- 2.0 Installation
- 2.1 Safety Precautions
- 2.2 UPS Installation
- 2.3 Battery Installation
- 2.4 Electrical Wiring
- 2.4.1 UPS Wire Size Guidelines
- 2.4.2 Power and Control Wiring
- 2.4.3 Battery Wiring
- 2.4.4 Wiring Connections
- 2.4.5 Wiring Inspection
- Figure 1 Single Line Diagram 10-125 kVA
- Figure 2 Single Line Diagram 10-125 kVA with Optional External Maintenance Bypass
- Figure 3 UPS Cabinet Installation Diagram 10-30 kVA
- Figure 4 UPS Cabinet Installation Diagram 40-50 kVA
- Figure 5 UPS Cabinet Installation Diagram 65-125 kVA
- Figure 6 Battery Cabinet Installation Diagram - 22-inch Frame
- Figure 7 Battery Cabinet Installation Diagram - 36-inch Frame (continued)
- Figure 8 Control Wiring Diagram 10-30 kVA
- Figure 9 Control Wiring Diagram 40-50 kVA
- Figure 10 Control Wiring Diagram 65-125 kVA
- Figure 11 Field Wiring Terminations (continued)
- 3.0 Operation
- 3.1 Operator Controls and Indicators
- 3.2 Display Screen Menu
- 3.3 Default Screen Messages
- 3.4 Alarm Messages
- 3.5 System Status Screens
- 3.6 Start-Up
- 3.7 Normal Operation
- 3.8 Shutdown
- 3.9 Response to a Power Failure
- 3.10 Response to a UPS Failure
- 3.11 Alarm Messages
- 4.0 Maintenance
- 5.0 System Options
- 5.1 General
- 5.2 Optional External Maintenance Bypass Cabinet
- 5.3 Optional Slim-Line Distribution
- 5.4 Optional Remote Status Panel
- 5.5 Optional Remote Contact Board
- 5.6 Optional RS-232 Interface Port
- 5.7 Optional Internal SNMP (Simple Network Management Protocol) Support
- 5.8 Optional Internal Modem
- 5.9 Optional SiteScan®/Sitemaster Interface
- 5.10 Optional IBM® AS/400 Signal Interface
- 5.11 Optional System/38 Power Warning Signal
- 5.12 Optional Battery Circuit Breaker
- 5.13 Optional Contact Isolator Board
- 5.14 Optional DC Ground Fault Alarm
- 5.15 Optional Computer Interface System
- 5.16 Optional Multi-Computer Interface System
- 5.17 Optional IBM® AS/400 Multi-Interface System
- Figure 22 Optional Maintenance Bypass Cabinet
- Figure 23 Optional Maintenance Bypass Cabinet with Isolation Transformer
- Figure 24 Optional Slim-Line Distribution (continued)
- Figure 25 Optional Remote Status Panel
- Figure 26 Optional Remote Contact Board
- Figure 27 Optional IBM® AS/400 Signal Interface
- Figure 28 Optional IBM® AS/400 Signal Interface (with Remote Status Panel)
- Figure 29 Optional Battery Circuit Breaker 10-75 kVA
- Figure 30 Optional Battery Circuit Breaker 100-125 kVA
- Figure 31 Optional Computer Interface System
- Figure 32 Optional Multi-Computer Interface System
- Figure 33 Optional IBM® AS/400 Multi-Interface System
- 6.0 Specifications
![](/manual/delta/ap300/specifications-english/images/img-64.png)
58 Operation
3.11 Alarm Messages
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Table 8 Alarm Messages
Alarm
Message
Meaning and
Corrective Action in Brackets [ ]
AC INPUT
Input power out of tolerance Frequency or voltage of the input power is outside the acceptable range. The
battery supplies power to the critical load through the UPS Module.
DC BUS
Charger in reduced current mode Customer has selected reduced current operation of the charger from a contact
external to the UPS.
Battery charger problems The battery is not being charged. The voltage produced by the charger is
insufficient to maintain a charge on the battery.
[Contact Liebert Customer Service and Support at 1-800-543-2378.]
Low battery warning issued Battery has been discharging and the Low Battery Warning Time (factory set at
5 minutes, adjustable range 1 to 99 minutes) has been reached. Note time
stamp on alarm message.
[Follow appropriate procedures to shut down the critical load in an orderly
sequence.]
Low battery shutdown Battery has discharged to the minimum allowable voltage and the UPS is shut
down. No power is being supplied to the critical load.
[When input power becomes available, perform a UPS start-up procedure.]
DC bus overvoltage DC bus voltage has exceeded the specified limit and the charger has been
turned off. The charger will automatically restart when the DC bus voltage
returns to within tolerance.
[Contact Liebert Customer Service and Support at 1-800-543-2378 if this
condition persists for more than 2 minutes.]
BYPASS
Bypass frequency out of tolerance Input power frequency is outside of the specified tolerance (adjustable range .5
to 5 Hz). Automatic transfers to the Static Bypass Line are prohibited.
[Do not operate the Rotary Switch while this condition is present.]
Load transferred to bypass due to
overload
Critical load connected to the UPS has exceeded the UPS power rating. The
load has been automatically transferred to the Static Bypass Line. Power to the
load is not being conditioned by the UPS. An automatic retransfer will be
attempted when the load is reduced.
[Determine cause of the overload and reduce the load.]
Load transferred to bypass due to DC
overvoltage
DC bus voltage has exceeded the specified limit. The load has been
automatically transferred to the Static Bypass Line. An automatic retransfer will
be attempted when the DC bus voltage returns to within tolerance.
[Contact Liebert Customer Service and Support at 1-800-543-2378 if this
condition persists for more than 2 minutes.]
Excessive retransfers attempted Several automatic retransfer attempts (15 attempts during 20 minutes or less)
have been made to retransfer the load from the Static Bypass Line back to the
UPS. The UPS has not been able to consistently sustain the load because of
an overload condition or an inverter failure. The load will remain on the Static
Bypass Line. Power to the load is not being conditioned by the UPS.
[Check other messages for inverter failure. Determine cause of the overload
and reduce the load.]
Static Switch failure A fault has been detected in the Static Transfer Switch. Automatic transfers to
the Static Bypass Line are prohibited.
[Contact Liebert Customer Service and Support at 1-800-543-2378.]